We often see the following kernel-bug in our logs:
kernel: Kernel BUG at objrmap:325
kernel: invalid operand: 0000 [1] SMP
kernel: CPU 0
kernel: Pid: 4752, comm: mhd3d.opteron Tainted: G U (2.6.5-7.151-smp SLES9_SP1_BRANCH-200503181131210000)
kernel: RIP: 0010:[<ffffffff8017d1de>] <ffffffff8017d1de>{page_add_rmap+334}
kernel: RSP: 0000:00000103e68d5db8 EFLAGS: 00010246
kernel: RAX: 000000000100806d RBX: 0000010007cefc48 RCX: 0000000000000000
kernel: RDX: ffffffff80596340 RSI: 00000101fb0d9d90 RDI: 0000010007cefc48
kernel: RBP: 00000000000165ae R08: 0000000000000000 R09: 000000000043c300
kernel: R10: 000000000d9b0b10 R11: 0000000000000002 R12: 00000101fb0d9d90
kernel: R13: 0000000000000003 R14: 00000103f0947800 R15: 000000000043c300
kernel: FS: 0000002a961864c0(0000) GS:ffffffff80554200(0000) knlGS:0000000000000000
kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: CR2: 000000000043c300 CR3: 0000000000101000 CR4: 00000000000006e0
kernel: Process mhd3d.opteron (pid: 4752, threadinfo 00000103e68d4000, task 00000101fb6e8c40)
kernel: Stack: 0000000000000246 ffffffff801740db 00000103e5028800 0000010231caf010
kernel: 0000000100000000 00000101fb0d9d90 00000103ea3b01e0 0000000000000000
kernel: 000000000043c300 00000103f0947800
kernel: Call Trace:<ffffffff801740db>{do_no_page+2987} <ffffffff801758a5>{handle_mm_fault+405}
kernel: <ffffffff80122554>{do_page_fault+468} <ffffffff801477c1>{sys_rt_sigaction+113}
kernel: <ffffffff80111041>{error_exit+0}
kernel:
kernel: Code: 0f 0b 10 ec 37 80 ff ff ff ff 45 01 8b 07 a9 00 80 00 00 75
kernel: RIP <ffffffff8017d1de>{page_add_rmap+334} RSP <00000103e68d5db8>
The bug always hits the same user-compiled executable,
always at the time the daily cron-jobs are run, so there
seems to be a dependency on another process. The process
4752 is part of an MPI-parallel application, and another
instance of it runs on the same node with PID 4751. Interestingly
after this bug the /proc/4751 dir (i.e., the one of the instance
not cited in the bug) is inaccessible. Thanks for any help
with this issue!
Regards
Christian Boehme
--
Dr. Christian Boehme
GWDG Private:
Am Fassberg Wilhelm-Raabe-Str. 15
37077 Göttingen 37083 Göttingen
email: [email protected] [email protected]
phone: +49 (0)551 201-1839 +49 (0)551 3077000
fax: +49 (0)551 201-2150 +49 (0)551 3077077
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